Nut-lock.



PATENTED MAY 21 A. KOST.'

P. 0. OTT L W NUT LOCK. .APPLIUATION FILED 1123.26.1907.

Uli

UNITED sTATEs PATENT oEEroE.

ANini-LOCK.

ASpet'ifeation of Letters Patent.

Patented may 21, 1907.

Application nea rebrmy 26,'19'07.- sans No. 359,535.

To all wir/0m it' may con/cern: a

Be it known that we, FRANK OTT and VJILLIAM A. Kos'r, citizens of t e United States, residing at Swissvale, in the county otf Allegheny t' invented certain new and use tullrnprov'eniente in Nut-,Locks of which the iotlowing is e specification.

'ilhis invention is a nutlock and'has for its obiect to provide a simple and eifetlve lock\ ing der o ci this kind, and also one embody-` ing cci 1. novel features of construction to be hers Jiter described whereby the unlocking ofth init for its removal from the bolt is readily eiected without injuring or impairing thel eiiiciencyof the further use. l

In the accompanying drawings, a side elevation of the invention.v plan `View. Fig. 8 is an elevation partly in section on the line 3--3 of Fig. 2. Figs. 4, 5 and 6 are plan views of the washers hereinafter referred to. v

Referring speciiically to the drawing, 10 and 11 denotetwo pieces of materialwhich are fastened togetherl by a bolt 12h'aving a .head 13 and a threaded portion 14 on which the nut 15 is screwed. yThe threaded portion ol' the bolt is iiattenedas indicated at- 16 'for a pnrpose to be hereinafteri-des'crilied. Only asniall portion of the bolt need be cut away to forni the flat portion so that the bolt will not be weakened.` The base of the nut is formed wi th ratchet teeth 17.

0n the bolt, between the base of the nut and the substructure, are mounted Washers Tn and 19. The washer 18 is next to the subructure and is made non-rotatable by forining its bolt-holewith a iiattened portion 20 corresponding with the 'flattened portion 16 oi the bolt, The edge oi' this washer is also recessed as at 21.' The washer 19 has a .spring tongue 22 engageable with the ratchet teeth 17; and at a point substantially dianietrically opposite this spring tongue isanother spring tongue 23 which is engage. blc with the recess 21. The tongue 22 prevents rotation of the nut in the direction to unscrew, and the tongue 23 prevents rotation of the washer 19 in either direction, whereby the nut is securely lockedto the bolt.

Figure 1 is and State of Pennsylvania, have' locking 'device for' Fig. 2isa` The parts herein described are readily applied, it being necessary only to place the two l washers in' position on the belt with the tongu 23 ehteringithe recess 21. then screwdup tightly against the washer 19. The tongue 22 automatically locks the 1 nut against any movement in the direction to unserew but permits its tree movement in the oppositedirection. To unlock the nut, the tongue 23 isv-pried up out of the recess 21 which releasesthe washer 19 leaving it tree to turn with the nut when the latter is unscrewed. "fThe thickness oi the tongue 23 is not greater thanthat of the washer 19, so .that afterl it is pried up as stated and the washer is rotated a short distance, it can enter the space between the base oi the nut and the face oi the washer 1S. When the tongue again reaches the recess it will enter the saine again, but ordinarily the washer 19 will by this time be sufficient-ly loose so that there will be no further locking action between the tongue 22 and the ratchet teeth 17, and the nut is then entirely free to be turned oii' the bolt. If the tool for prying up the tongue is of the saine thickness as thc washer 18, it can 4be left in the recess, which will prevent the tongue from springing bach thereinto.

-The spring tongue '22 is formed by a short angular cut 24 in the washer 19 adjacent its bolt-,hole The tongue 23 formed by'two cuts 25 which extend inwardly from the edge oi' the washer for a short distance; The distance between thev cuts 25 is such that the tongud 23 will be .of a width to fit snugly in l the recess 21. l In Fig. v(i is shown a forni of washer to take the place of the washer 18 when the nut-lock l is applied to a rail-joint. When used in this connection ythe bolt and the bolt-hole of the l washer are not ilatltened, the washer being ll made non-rotatable by ilaltening its edge as at 26. In use, this part engages the foot oi' the tislnplate and thus prevents rotation of i the washer.l i 'l We claimi- A nut-lock comprising a bolt, a non-rotal table washer thereon having n. recess, a nut having a ratchet base, and arotatable washer betweenr the nut and the recessed washer having oppositely presented spring tongues y The nut is angngoahle respectively with 'the ratchet hasn l mul with the mucss ufjhc first. mcnflmwd washer', the spring tunguu. which ongzLgos said muws. having n Lhukrmss not g'rezx-ter Lhim that, of its washer tw perrn'litit to enter the spada between theI lyusc of the uut :md tho top 0f the recessed wmshcz.

In tesiilmmy whereof we ahx (nur sgllaf Lures, in presouce'u two witnesses.

FRANK C. OTT. v WILLIAB'I A. KUST. Witnesses:

GmEON Il'. JAQUAX, ALBERT l. Ronlms. 

